TABLE 3.

Proportion of Consumers Using Herbs Based on Natural Standard Indications, Stratified by Herb and Demographic Variables^*

	Herbs combined (except echinacea)			Echinacea
Variable	Evidence-based use (%)† (n=48)	Adjusted OR (95% CI) ‡	P value	Evidence-based use (%)† (n=286)	Adjusted OR (95% CI) ‡	P value
Sex
Female	27.6	1.81 (1.23–2.67)	.003	66.7	0.84 (0.58–1.21)	.34
Male	17.5	Referent		70.3	Referent
Age (y)
18–39	18.5	0.43 (0.24–0.77)	.005	67.7	1.15 (0.59–2.25)	.68
40–59	24.5	0.48 (0.28–0.82)	.007	69.2	1.24 (0.64–2.40)	.53
≥60	33.0	Referent		63.7	Referent
Race
Hispanic	23.8	0.71 (0.45–1.11)	.71	60.4	0.71 (0.45–1.11)	.13
Black§	16.3	0.51 (0.38–0.69)	<.001	76.2	1.61 (0.64–4.07)	.31
Other	0.0	…	…	67.8	1.03 (0.38–2.78)	.95
White§	25.8	Referent		68.0	Referent
Education//
Graduate school	35.3	2.91 (1.13–7.45)	.03	69.0	0.83 (0.45–1.55)	.56
>High school or college	24.2	1.55 (1.10–2.20)	.01	66.5	0.76 (0.51–1.14)	.19
≤High school	19.3	Referent		71.1	Referent

^*CI = confidence interval; OR = odds ratio.

^†Weighted estimate.

^‡Multivariable logistic regression model with age, sex, ethnicity, and education as covariates was used to compute the ORs, 95% CIs, and respective P values.

^§Non-Hispanic.

^//Two echinacea users had missing education data.